Spring swivel-jar socket



P. ARBON.

SPRING SWIVEL JAR SOCKET.

APPLICATION FILED MAR. 18, 1920.

Patented June 15,

3 SHEETS-SHEE INVENTOR P. ARBON.

SPRING SWIVEL JAR SOCKET.

APPLICATION FILED MAR. I8. 1920.

1,343,542. Patented June 15, 1920 3 SHEETS-SHEET 2- P. ARBON.

SPRING SWIVEL JAR SOCKET.

APPLICATION FILED MAR. I8, I920.

1 343 542 Patented June 15, 1920.

3 SHEETSSHEET 3.

FISH.

2 I: 20 /9 MI? WITNESSES waaww.

PAUL ARBON, 0F TULSA, OKLAHOMA.

SPRING SWIVEL-JAR SOCKET.

Specification of Letters Patent.

Patented June 15, 1920.

Application Wed March 18, 1920. Serial No. 366,952.

To all whom it may concern:

Be it known that 1, PAUL Anson, residing at Tulsa, in the county of Tulsa and State of Oklahoma, a subject of Great Britain, have invented or discovered certain newinto the well, and 'to the portion passing down from the pulley is attached a string of tools consisti of the jarring means, the stem and the it, the combined weight of said parts averaging between three and four thousand pounds. The drilling is effected by an upward pull on the rope to raise the string of tools one, twoor three feet, and allowing it to drop, the efficiency of the blow thus imparted being of course dependent on the weight of the string of tools connected to the rope and the rope itself, and the distance said parts are raised.

. In drilling oil or gas wells there are two operations, one known as spudding, which is employed until a considerable depth has been attained. In this operation the crank pin on the engine shaft is connected generally by a rope to a shoe encircling drilling rope at a point intermediate the bull wheel and the pulle at the top of the derrick. A brake is app ied to the bull wheel so that the lateral movement of the spudding shoe by the crank of the engine will exert a downward pull on the part of the rope between the bull wheel and the top pulley and an upward pull on the portion of the rope extending down into the well. As the well increases in depth, the operator loosens the grip of the brake on the bull wheel to permit the rope to gradually pass o'lf of the bull wheel. This operation is continued until the increased strain on the top pulley bull wheel and other parts, due to the increasing length of rope becomes too great.

When such a point is reached, the walkingbeam is connected to the crank pin, the spudding shoe and its connection to the crank pin being removed, and the clamps" carried by the temper screw are secured to the rope at a oint between the top pulley and the'well. hereafter the shocks, strains, etc., incident to lifting the rope and string of tools, are borne by the samson post on which the walking beam is mounted and the I hand 'wheel shaft. When pulling up the rope to raise the bit, the mechanism employed therefor is subjected to great successive strains, first that of taking up the slack of the rope in the well and then lifting the jars, stem and bit connected to the rope. When using Manila rope, the stretching of the latter will operate to prevent a sudden imposition of these loads on the lifting mechanism, but when using wire rope, as has become the common practice especially when drilling deep wells, there is no such progressive or gradual picking up of the load, there not being practically any elasticity or stretching in wire rope, and hence the derrick and other parts of the operating mechanism are subjected to severe shocks and strains on each upward movement of the rope and string of tools.

The pbject of the invention described herein is to provide a resilient connection between the rope and a socket to be con- 'nected to a string of tools and embodying arring and swiveling features. The invention is hereinafter more fully described and claimed.

In the accompanying drawings-forming a part of this specification, F i ure 1 is a side elevation of a well drilling errick and operating mechanism; Fig. 2 is a sectional elevation of a swiveling jar socket having my improvements embodied therein; Fig. 3

is a similar view showing a modification of the same; Figs. 4: and 5 are side and sectional elevations illustrating other modifications of the improvement.

When'spudding, the pin on the crank 1 carried by the shaft of the band wheel 2 is connected by suitable means as'a rope 3 to the spudding shoe 4 slidably'enga ing the portion of the rope 5 passing up rom the bull wheel 6, to which'is applied a brake consisting of a band 7 and an operating lever 8 to regulate the movement of the rope from, the bull wheel. As the crank rotates, the shoe is jerked to the left thereby drawing the rope around the crown or top pulley and raising the string 'of-tools in the well. As the string of tools weighs three or four thousand pounds to which is gradually added the weight of the rope, the crown pulle bull wheel derrick andthe bearings for t e band wheel shaft are subjected to severe sudden shocks and strains by the jerk on the drill rope,

In order that the load formed by the string of tools and rope may be applied gradually to the operating means, a resilient cushion is provided between the rope and the string of tools. In the construction shown in Fig. 2 the body portion or cylinder 9 is provided internally and approximately midway of its length with a shoulder or abutment 10 which preferably is made integral with the'wall of the shell or cylinder to withstand the shocks or jars to which it is subjected in operation. This construction is preferably made by drilling holes from opposite ends .of the cylinder, such holes or bores being of a suflicient diameter, the one to receive the swivelling jar or block 11 and the other the spring 12. While for convenience of manufacture it is preferred to make these two bores a and Z) of the same diameter, the bore a, may be either larger or smaller than the bore 6 dependent upon the diameter of the spring required. The lower end of the portion of the shell having the bore 7) is flared outwardly and internally threaded for the reception of a conical pin 13- carried by the stem or bit of the string of tools. The jar or block 14 is made of such diameter relative to that of the bore 1) as to move freely not only vertically but also to rotate within the bore 6 and is provided with a passage therethrough, the lower portion of such passage bein flared so as to permit the spreading out of the rope strands and the babbitting of the stranded .end within the conical portion of this opening. The upper end of the spring bears against an abutment formed by a threaded plug 15 screwing into the upper end of the bore a, said plug having-an opening therethrough for the passage of the. rope 5 as shown. Before placing'the spring in position within this upper bore, a -follower head 16 is passed down into it, saidv head being constructed to bear upon the upper end of the abutment 10 and provided with a tubularextension 17 which passes down through the passage through the abutment. This extension is made of such a length that it will project into the bore 1) such a distance relative to the downward movement of the ar or block in the bore that when the bit strikes the bottom of the well and the extension is forced down by the spring, the jar or block will move down from the end of the extension and be free to rotate. Betweenthe head 16 and the plug 15 is interposed a spring 12 of such a length as to sustain the-wei ht of the socket-and the string of tools attac ed thererename suddenly imposed by a quick upward movement or jerk of the rope 5.

The parts are shown in the drawings in the position they would occupy when the bit is resting on the bottom of the well and the rope is about to be moved upward by the pulling mechanism, as hereinbefore stated. As the block is pulled up, it will first abut against the tubular extension of the follower head resulting in a compression of the spring so that the load of the tools is very gradually imposed on the rope and the rope lifting mechanism. In case the bit should stick in the well, the additional load or the normal load quickly applied as by a sudden upward jerk on the rope thus imposed will result in such a compression of the spring that the jar or block will strike with sufficient force on the lower end of the abutment 10 to loosen the tool. 0n the reversal of the pulling mechanism at the top of the well, the tools will drop and during this downward movement the expansion ofthe spring will force the follower head and the As shown in Fig. 3, the tubular member 17 through which the pull on the rope is transmitted to the spring, may be made integral with the jar or block.

In the construction'shown in Figs. 4; and 5, the tubular member 17 whereby the pull on the jar or block 11 is transmitted through the follower head 16 to the spring, is made independent of both the follower head and the jar or block, in order that "the jar or block and the tubular transmitting member may be removed from the socket through a slot 19 formed through the wall 'of the portion of the-socket in which the jar or block operates, said slot having a length and width a little greater than the length and the largest diameter of the jar or block. Although the tubular member 17 is in the construc tion shown a little longer than the slot it can .be removed therethrough by first removing the swivel jar or block and then sliding the tubular member downuntil its lower end is below the upper end of the slot, and then tipping the tubular member to an angular position, when .it can be moved lon itudinallyout through the slot. The accldental removal of the swivel or block through the slot 19 may be prevented .by an suitable means but preferably by a bar 20 aving its ends held in notches 21 at the ends of the slot by pins 22. As this bar is substantially narrower than the slot, there will be openings each side of the bar for the escape of sand and water from the bore b of the to prevent it striking against either the pin 13 on the stem of the string of tools and screwing into the conical box as hereinbefore described, or against the plug 22, when the construction shown in Figs. 4 and 5 is employed, the lower portion of the bore 6 is made smaller than the up er portion, thereby forming an annular a utment 24, and the swivel jar or block is formed with a shoulder 25, which will strike against the abutment before the lower end of the block reaches the plug 22 or pin 13 as the case may be.

1t is characteristic of this improvement that provision is made for a swiveling oftools and provided with a shoulder or abutment, a block adapted to be connected to an operating rope and a spring, the block and spring being arranged below and above the abutment respectively, a seat on the shell for the upper end of the spring, and means interposed between the block and spring for transmitting the weight of the shell and parts carried thereby to the block and permitting on the compression of the spring the transference of such weight from the spring to the abutment.

2. The combination of a shell having an annular internal shoulder or abutment and having a shoulder above the annular shoulder and adapted to be connected to a string of tools, a spring interposed between said shoulders, a movable jar or block adapted to be connected to an operating rope arranged. below the annular shoulder, and means whereby the spring may be compressed on the upward movement of the jar or block.

3. The combination of a shell having spaced abutments and having one end adapted to be connected to a string of tools, a follower head and a spring arranged intermediate the abutments, a movable jar or block adapted to be connected to an operating rope and arranged below said abutments, and a tubular member passing through that lower abutment and interposed between the jar or block and the follower head.

In testimony whereof I have hereunto set my hand.

PAUL ARBON. 

